[Xymon] Corrupted data in BBALPHAMSG?

David Baldwin david.baldwin at ausport.gov.au
Fri Jul 29 01:59:59 CEST 2011


John,
>
> That is exactly what I was thinking.
>
>  
>
> Xymon version 4.3.0
>
>  
>
> In my script I get the results as follows:
>
> -          Echo $BBALPHAMSG (everything is fine – except for
> formatting which is what I am trying to correct)
>
> -          Echo “$BBALPHAMSG” >file (message is written to file and
> formatting is as I would like but the “\*” characters are converted as
> described below)
>
> -          Echo $BBALPHAMSG >file (same as above but message is not
> formatted)
>
>  
>
So it's in a shell script you're writing? Just don't enclose $BBALPHAMSG
in double quotes and you'll be fine.
If it's a BASH script, then the behaviour above is as documented - see
'man bash' under QUOTING:

...
       Enclosing  characters  in double quotes preserves the literal
value of all characters within the quotes,
       with the exception of $, ‘, \, and, when history expansion is
enabled, !.  The characters $ and ‘ retain
       their  special  meaning  within double quotes.  The backslash
retains its special meaning only when fol-
       lowed by one of the following characters: $, ‘, ", \, or
<newline>.  A double quote may be quoted within
       double  quotes by preceding it with a backslash.  If enabled,
history expansion will be performed unless
       an !  appearing in double quotes is escaped using a backslash. 
The backslash preceding the  !   is  not
       removed.
...
       Words  of  the form $'string' are treated specially.  The word
expands to string, with backslash-escaped
       characters replaced as specified by the ANSI C standard. 
Backslash escape sequences,  if  present,  are
       decoded as follows:
              \a     alert (bell)
              \b     backspace
              \e     an escape character
              \f     form feed
              \n     new line
              \r     carriage return
              \t     horizontal tab
              \v     vertical tab
              \\     backslash
              \'     single quote
              \nnn   the eight-bit character whose value is the octal
value nnn (one to three digits)
              \xHH   the eight-bit character whose value is the
hexadecimal value HH (one or two hex digits)
              \cx    a control-x character
...


David.
>
> I have tried to pipe both of these through sed before sending to the
> file but that still isn’t working as the characters are converted
> prior to the pipe.
>
>  
>
> There has got to be a way that I can write these to a file but I am
> just missing something simple.
>
>  
>
> Thanks,
>
> John
>
> _____________________________________________________________________
>
> John Rothlisberger
>
> Senior Analyst
>
> Application & Technology Integration
>
> Implementation & Managed Services for Business Process Outsourcing
>
> IT Strategy, Infrastructure & Security - Technology Growth Platform
>
> Accenture
>
> 312.693.3136 office**
>
> _____________________________________________________________________
>
>  
>
> *From:*David Baldwin [mailto:david.baldwin at ausport.gov.au]
> *Sent:* Wednesday, July 27, 2011 5:10 PM
> *To:* Rothlisberger, John R.
> *Cc:* xymon at xymon.com
> *Subject:* Re: [Xymon] Corrupted data in BBALPHAMSG?
>
>  
>
> John,
>
> The "corrupted characters" you are seeing are the ASCII characters
> corresponding to the number after the \ character. e.g. \4 -> ^D, \44
> -> $, etc. It looks like the string is being passed to something like
> a string formatting function (e.g. sprintf) without being properly
> quoted to escape '\' characters.
>
> What version of Xymon are you using?
>
> David.
>
> Has anyone noticed what appears to be corruption in BBALPHAMSG?  I
> have only noticed this behavior (so far) on disk checks and it always
> follows the backslash between the Total Space and Available Space.  It
> also seems to be consistent from host to host (ex.  The host below
> will have the same corruption for each disk check other hosts may show
> slightly different characters but not all hosts exhibit errors). 
>
>  
>
> Within my email script all I am doing is ‘echo “$BBALPHAMSG” >tmpfile’.
>
>  
>
> Xymon Server: Ubuntu 10.04
>
> Client (in this instance): W2k3 Server
>
>  
>
> The actual client data appears to be just as expected with no odd
> characters (this is pulled from the “Client data” link on the Xymon page):
>
>  
>
> [disk]
>
> Filesystem     1K-blocks     Used       Avail    Capacity   
> Mounted      Summary(Total\Avail)
>
> C               20241899   11256291    8985608    55%      
> /FIXED/C        19.31gb\8.58gb
>
> D              856979392  641409136  215570256    74%      
> /FIXED/D        817.28gb\205.59gb
>
> F              179205040   54697624  124507416    30%      
> /FIXED/F        170.92gb\118.75gb
>
> G              179205072  174737304    4467768    97%      
> /FIXED/G        170.92gb\4.26gb
>
> H              179205072  174778264    4426808    97%      
> /FIXED/H        170.92gb\4.22gb
>
> I              176064364  129088448   46975916    73%      
> /FIXED/I        167.92gb\44.81gb
>
> J             1756490840   41785572 1714705268     2%      
> /FIXED/J        1.65tb\1.61tb
>
> O              976771068      95844  976675224     0%      
> /FIXED/O        931.53gb\931.44gb
>
>  
>
> But then when I use BBALPHAMSG within an email script there can be odd
> corruption:
>
>  
>
> yellow Wed Jul 27 09:24:50 2011 - Filesystems NOT ok
>
> &yellow G (97% used) has reached the WARNING level (97%)
>
> &yellow H (97% used) has reached the WARNING level (97%)
>
>  
>
> Filesystem     1K-blocks     Used       Avail    Capacity   
> Mounted      Summary(Total\Avail)
>
> C               20241899   11256291    8985608    55%      
> /FIXED/C        19.31gb\8.58gb
>
> D              856979392  641409136  215570256    74%      
> /FIXED/D        817.28gb<85>.59gb
>
> F              179205040   54697624  124507416    30%      
> /FIXED/F        170.92gb    8.75gb
>
> G              179205072  174737304    4467768    97%      
> /FIXED/G        170.92gb^D.26gb
>
> H              179205072  174778264    4426808    97%      
> /FIXED/H        170.92gb^D.22gb
>
> I              176064364  129088448   46975916    73%      
> /FIXED/I        167.92gb$.81gb
>
> J             1756490840   41785572 1714705268     2%      
> /FIXED/J        1.65tb^A.61tb
>
> O              976771068      95844  976675224     0%      
> /FIXED/O        931.53gb\931.44gb
>
>  
>
> See
> http://xymonserver/xymon-cgi/svcstatus.sh?HOST=ServerA&SERVICE=disk
> <http://xymonserver/xymon-cgi/svcstatus.sh?HOST=ServerA&SERVICE=disk>
>
> Thanks,
>
> John
>
> _____________________________________________________________________
>
> John Rothlisberger
>
> Senior Analyst
>
> Application & Technology Integration
>
> Implementation & Managed Services for Business Process Outsourcing
>
> IT Strategy, Infrastructure & Security - Technology Growth Platform
>
> Accenture
>
> 312.693.3136 office
>
> _____________________________________________________________________
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
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> privileged, proprietary, or otherwise private information. If you have
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>
>
>
>
> -- 
> David Baldwin - Assistant Director, Infrastructure (acting)
> Information and Communication Technology Services
> Australian Sports Commission          http://ausport.gov.au
> Tel 02 62147830 Fax 02 62141830       PO Box 176 Belconnen ACT 2616
> david.baldwin at ausport.gov.au <mailto:david.baldwin at ausport.gov.au>          Leverrier Street Bruce ACT 2617
>
>  
>
> ------------------------------------------------------------------------
>
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-- 
David Baldwin - Assistant Director, Infrastructure (acting)
Information and Communication Technology Services
Australian Sports Commission          http://ausport.gov.au
Tel 02 62147830 Fax 02 62141830       PO Box 176 Belconnen ACT 2616
david.baldwin at ausport.gov.au          Leverrier Street Bruce ACT 2617

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